Once I put my amp in my trunk, I can only fit cables and small stuff. Getting it out is a pain because it has to lay on it's back on the floor of the trunk, and I have to angle it to get it out. The guitar(s) I take with me to jam have to go in the backseat, leaving only room for one passenger.

I watched a guy carry his bass amp, cabinet, cables and bass into a gig ,all in one trip. The dude has the MarkBass gear, a 2x10 cab and solid state head. The gear is light and sounds incredible, but is very expensive. The amp put out 300+ watts. If I were gigging I would definitely consider MarkBass.